The National Wildlife Federation's Hike & Seek event, which is part of the organization's larger Be Out There campaign, will take place in those cities. The event features a hike (of course) along with stamp/sticker collection, wildlife displays, snacks, crafts, awards to top "junior naturalists," and photos with Ranger Rick. Registration is required. For more details about the event, click here.
If you don't have children but would like to volunteer to help at the event, click here.